While trying to understand a strange template error, I notice the existence of a "CompileComments" setting available in site.ini (disabled by default).

A fatal error occurs when I set it to "enabled" in the site.ini global override :
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Parse error: syntax error, unexpected '}' in /var/www/ez40/var/ezwebin_site/cache/template/compiled/pagelayout-6866d9f8d01866d86b1ef551109b9c3b.php on line 4172
Fatal error: eZ Publish did not finish its request

The execution of eZ Publish was abruptly ended, the debug output is present below.
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The error don't always occur at the same location / in the same template.
The example above comes from a fresh ez4.0+ezwebin installation and occurs in the agelayout.tpl

The initial error I encountered was in a 'folder' node/view/full override.

Is this setting obsolete ?

Steps to reproduce

1) Download ez4.0 and do a simple installation : english (main language) and french optional, ezwebin package, uri mode.

2) Finish install, hit the site frontpage.

3) Add the following in settings/override/site.ini.append.php :

[TemplateSettings]
CompileComments=enabled

4) Clear cache, refresh the site frontpage

5) Kaboom